\begin{table}[tbp] \centering
\newcolumntype{R}{>{\raggedleft\arraybackslash}X}
\newcolumntype{L}{>{\raggedright\arraybackslash}X}
\newcolumntype{C}{>{\centering\arraybackslash}X}

\begin{tabularx}{\linewidth}{lccc}

\toprule
&{(1)}&{(2)}&{(3)} \tabularnewline \midrule
{estimator}&{turnout\_pos\_req}&{turnout\_urne}&{turnout\_tot\_req} \tabularnewline
\midrule \addlinespace[\belowrulesep]
\multicolumn\{4\}\{l\}\{\textit\{Panel A: Differences based on event study estimates restricted to precincts with increased distance\}\} &&& \tabularnewline
\midrule BJS (2021)&0.619**&-0.169&0.450* \tabularnewline
CS (2021)&0.842**&-0.251&0.590* \tabularnewline
SA (2020)&0.246&0.176&0.422* \tabularnewline
TWFE-OLS&0.633**&-0.023&0.610** \tabularnewline
dCDH (2020&0.807**&-0.278&0.529* \tabularnewline
\multicolumn\{4\}\{l\}\{\textit\{Panel B: Differences based on event study estimates conditional on log distance\}\}&&& \tabularnewline
BJS (2021)&0.413*&-0.034&0.379* \tabularnewline
CS (2021)&0.316&0.052&0.368 \tabularnewline
SA (2020)&0.125&0.194&0.319 \tabularnewline
TWFE-OLS&0.461**&0.028&0.489** \tabularnewline
\midrule dCDH (2020&0.495*&-0.105&0.391* \tabularnewline
\bottomrule 

\end{tabularx}
\end{table}
